Michael Neale
661 lines
21 KiB
Rust
661 lines
21 KiB
Rust
use crate::agents::chatrecall_extension;
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use crate::agents::extension_manager_extension;
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use crate::agents::skills_extension;
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use crate::agents::todo_extension;
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use std::collections::HashMap;
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use crate::agents::mcp_client::McpClientTrait;
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use crate::config;
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use crate::config::extensions::name_to_key;
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use crate::config::permission::PermissionLevel;
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use once_cell::sync::Lazy;
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use rmcp::model::Tool;
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use rmcp::service::ClientInitializeError;
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use rmcp::ServiceError as ClientError;
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use serde::Deserializer;
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use serde::{Deserialize, Serialize};
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use thiserror::Error;
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use tracing::warn;
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use utoipa::ToSchema;
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#[derive(Error, Debug)]
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#[error("process quit before initialization: stderr = {stderr}")]
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pub struct ProcessExit {
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stderr: String,
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#[source]
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source: ClientInitializeError,
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}
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impl ProcessExit {
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pub fn new<T>(stderr: T, source: ClientInitializeError) -> Self
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where
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T: Into<String>,
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{
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ProcessExit {
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stderr: stderr.into(),
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source,
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}
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}
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}
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pub static PLATFORM_EXTENSIONS: Lazy<HashMap<&'static str, PlatformExtensionDef>> = Lazy::new(
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|| {
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let mut map = HashMap::new();
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map.insert(
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todo_extension::EXTENSION_NAME,
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PlatformExtensionDef {
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name: todo_extension::EXTENSION_NAME,
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description:
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"Enable a todo list for Goose so it can keep track of what it is doing",
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default_enabled: true,
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client_factory: |ctx| Box::new(todo_extension::TodoClient::new(ctx).unwrap()),
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},
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);
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map.insert(
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chatrecall_extension::EXTENSION_NAME,
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PlatformExtensionDef {
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name: chatrecall_extension::EXTENSION_NAME,
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description:
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"Search past conversations and load session summaries for contextual memory",
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default_enabled: false,
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client_factory: |ctx| {
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Box::new(chatrecall_extension::ChatRecallClient::new(ctx).unwrap())
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},
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},
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);
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map.insert(
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"extensionmanager",
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PlatformExtensionDef {
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name: extension_manager_extension::EXTENSION_NAME,
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description:
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"Enable extension management tools for discovering, enabling, and disabling extensions",
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default_enabled: true,
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client_factory: |ctx| Box::new(extension_manager_extension::ExtensionManagerClient::new(ctx).unwrap()),
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},
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);
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map.insert(
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skills_extension::EXTENSION_NAME,
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PlatformExtensionDef {
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name: skills_extension::EXTENSION_NAME,
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description: "Load and use skills from .claude/skills or .goose/skills directories",
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default_enabled: true,
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client_factory: |ctx| Box::new(skills_extension::SkillsClient::new(ctx).unwrap()),
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},
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);
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map
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},
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);
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#[derive(Clone)]
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pub struct PlatformExtensionContext {
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pub session_id: Option<String>,
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pub extension_manager:
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Option<std::sync::Weak<crate::agents::extension_manager::ExtensionManager>>,
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pub tool_route_manager:
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Option<std::sync::Weak<crate::agents::tool_route_manager::ToolRouteManager>>,
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}
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#[derive(Debug, Clone)]
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pub struct PlatformExtensionDef {
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pub name: &'static str,
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pub description: &'static str,
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pub default_enabled: bool,
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pub client_factory: fn(PlatformExtensionContext) -> Box<dyn McpClientTrait>,
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}
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/// Errors from Extension operation
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#[derive(Error, Debug)]
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pub enum ExtensionError {
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#[error("failed a client call to an MCP server: {0}")]
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Client(#[from] ClientError),
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#[error("invalid config: {0}")]
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ConfigError(String),
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#[error("error during extension setup: {0}")]
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SetupError(String),
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#[error("join error occurred during task execution: {0}")]
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TaskJoinError(#[from] tokio::task::JoinError),
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#[error("IO error: {0}")]
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IoError(#[from] std::io::Error),
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#[error("failed to initialize MCP client: {0}")]
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InitializeError(#[from] ClientInitializeError),
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#[error("{0}")]
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ProcessExit(#[from] ProcessExit),
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}
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pub type ExtensionResult<T> = Result<T, ExtensionError>;
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#[derive(Debug, Clone, Deserialize, Serialize, Default, ToSchema)]
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pub struct Envs {
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/// A map of environment variables to set, e.g. API_KEY -> some_secret, HOST -> host
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#[serde(default)]
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#[serde(flatten)]
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map: HashMap<String, String>,
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}
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impl Envs {
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/// List of sensitive env vars that should not be overridden
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const DISALLOWED_KEYS: [&'static str; 31] = [
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// 🔧 Binary path manipulation
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"PATH", // Controls executable lookup paths — critical for command hijacking
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"PATHEXT", // Windows: Determines recognized executable extensions (e.g., .exe, .bat)
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"SystemRoot", // Windows: Can affect system DLL resolution (e.g., `kernel32.dll`)
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"windir", // Windows: Alternative to SystemRoot (used in legacy apps)
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// 🧬 Dynamic linker hijacking (Linux/macOS)
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"LD_LIBRARY_PATH", // Alters shared library resolution
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"LD_PRELOAD", // Forces preloading of shared libraries — common attack vector
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"LD_AUDIT", // Loads a monitoring library that can intercept execution
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"LD_DEBUG", // Enables verbose linker logging (information disclosure risk)
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"LD_BIND_NOW", // Forces immediate symbol resolution, affecting ASLR
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"LD_ASSUME_KERNEL", // Tricks linker into thinking it's running on an older kernel
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// 🍎 macOS dynamic linker variables
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"DYLD_LIBRARY_PATH", // Same as LD_LIBRARY_PATH but for macOS
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"DYLD_INSERT_LIBRARIES", // macOS equivalent of LD_PRELOAD
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"DYLD_FRAMEWORK_PATH", // Overrides framework lookup paths
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// 🐍 Python / Node / Ruby / Java / Golang hijacking
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"PYTHONPATH", // Overrides Python module resolution
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"PYTHONHOME", // Overrides Python root directory
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"NODE_OPTIONS", // Injects options/scripts into every Node.js process
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"RUBYOPT", // Injects Ruby execution flags
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"GEM_PATH", // Alters where RubyGems looks for installed packages
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"GEM_HOME", // Changes RubyGems default install location
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"CLASSPATH", // Java: Controls where classes are loaded from — critical for RCE attacks
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"GO111MODULE", // Go: Forces use of module proxy or disables it
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"GOROOT", // Go: Changes root installation directory (could lead to execution hijacking)
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// 🖥️ Windows-specific process & DLL hijacking
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"APPINIT_DLLS", // Forces Windows to load a DLL into every process
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"SESSIONNAME", // Affects Windows session configuration
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"ComSpec", // Determines default command interpreter (can replace `cmd.exe`)
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"TEMP",
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"TMP", // Redirects temporary file storage (useful for injection attacks)
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"LOCALAPPDATA", // Controls application data paths (can be abused for persistence)
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"USERPROFILE", // Windows user directory (can affect profile-based execution paths)
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"HOMEDRIVE",
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"HOMEPATH", // Changes where the user's home directory is located
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];
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/// Constructs a new Envs, skipping disallowed env vars with a warning
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pub fn new(map: HashMap<String, String>) -> Self {
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let mut validated = HashMap::new();
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for (key, value) in map {
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if Self::is_disallowed(&key) {
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warn!("Skipping disallowed env var: {}", key);
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continue;
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}
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validated.insert(key, value);
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}
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Self { map: validated }
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}
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/// Returns a copy of the validated env vars
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pub fn get_env(&self) -> HashMap<String, String> {
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self.map.clone()
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}
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/// Returns an error if any disallowed env var is present
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pub fn validate(&self) -> Result<(), Box<ExtensionError>> {
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for key in self.map.keys() {
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if Self::is_disallowed(key) {
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return Err(Box::new(ExtensionError::ConfigError(format!(
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"environment variable {} not allowed to be overwritten",
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key
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))));
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}
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}
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Ok(())
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}
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fn is_disallowed(key: &str) -> bool {
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Self::DISALLOWED_KEYS
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.iter()
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.any(|disallowed| disallowed.eq_ignore_ascii_case(key))
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}
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}
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/// Represents the different types of MCP extensions that can be added to the manager
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#[derive(Debug, Clone, Deserialize, Serialize, ToSchema)]
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#[serde(tag = "type")]
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pub enum ExtensionConfig {
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/// Server-sent events client with a URI endpoint
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#[serde(rename = "sse")]
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Sse {
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/// The name used to identify this extension
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name: String,
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#[serde(default)]
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#[serde(deserialize_with = "deserialize_null_with_default")]
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#[schema(required)]
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description: String,
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uri: String,
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#[serde(default)]
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envs: Envs,
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#[serde(default)]
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env_keys: Vec<String>,
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// NOTE: set timeout to be optional for compatibility.
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// However, new configurations should include this field.
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timeout: Option<u64>,
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#[serde(default)]
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bundled: Option<bool>,
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#[serde(default)]
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available_tools: Vec<String>,
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},
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/// Standard I/O client with command and arguments
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#[serde(rename = "stdio")]
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Stdio {
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/// The name used to identify this extension
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name: String,
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#[serde(default)]
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#[serde(deserialize_with = "deserialize_null_with_default")]
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#[schema(required)]
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description: String,
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cmd: String,
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args: Vec<String>,
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#[serde(default)]
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envs: Envs,
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#[serde(default)]
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env_keys: Vec<String>,
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timeout: Option<u64>,
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#[serde(default)]
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bundled: Option<bool>,
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#[serde(default)]
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available_tools: Vec<String>,
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},
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/// Built-in extension that is part of the bundled goose MCP server
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#[serde(rename = "builtin")]
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Builtin {
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/// The name used to identify this extension
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name: String,
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#[serde(default)]
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#[serde(deserialize_with = "deserialize_null_with_default")]
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#[schema(required)]
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description: String,
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display_name: Option<String>, // needed for the UI
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timeout: Option<u64>,
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#[serde(default)]
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bundled: Option<bool>,
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#[serde(default)]
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available_tools: Vec<String>,
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},
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/// Platform extensions that have direct access to the agent etc and run in the agent process
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#[serde(rename = "platform")]
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Platform {
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/// The name used to identify this extension
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name: String,
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#[serde(deserialize_with = "deserialize_null_with_default")]
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#[schema(required)]
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description: String,
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#[serde(default)]
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bundled: Option<bool>,
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#[serde(default)]
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available_tools: Vec<String>,
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},
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/// Streamable HTTP client with a URI endpoint using MCP Streamable HTTP specification
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#[serde(rename = "streamable_http")]
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StreamableHttp {
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/// The name used to identify this extension
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name: String,
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#[serde(deserialize_with = "deserialize_null_with_default")]
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#[schema(required)]
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description: String,
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uri: String,
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#[serde(default)]
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envs: Envs,
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#[serde(default)]
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env_keys: Vec<String>,
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#[serde(default)]
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headers: HashMap<String, String>,
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// NOTE: set timeout to be optional for compatibility.
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// However, new configurations should include this field.
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timeout: Option<u64>,
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#[serde(default)]
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bundled: Option<bool>,
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#[serde(default)]
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available_tools: Vec<String>,
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},
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/// Frontend-provided tools that will be called through the frontend
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#[serde(rename = "frontend")]
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Frontend {
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/// The name used to identify this extension
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name: String,
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#[serde(deserialize_with = "deserialize_null_with_default")]
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#[schema(required)]
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description: String,
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/// The tools provided by the frontend
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tools: Vec<Tool>,
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/// Instructions for how to use these tools
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instructions: Option<String>,
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#[serde(default)]
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bundled: Option<bool>,
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#[serde(default)]
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available_tools: Vec<String>,
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},
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/// Inline Python code that will be executed using uvx
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#[serde(rename = "inline_python")]
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InlinePython {
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/// The name used to identify this extension
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name: String,
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#[serde(deserialize_with = "deserialize_null_with_default")]
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#[schema(required)]
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description: String,
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/// The Python code to execute
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code: String,
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/// Timeout in seconds
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timeout: Option<u64>,
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/// Python package dependencies required by this extension
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#[serde(default)]
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dependencies: Option<Vec<String>>,
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#[serde(default)]
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available_tools: Vec<String>,
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},
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}
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impl Default for ExtensionConfig {
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fn default() -> Self {
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Self::Builtin {
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name: config::DEFAULT_EXTENSION.to_string(),
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display_name: Some(config::DEFAULT_DISPLAY_NAME.to_string()),
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description: "default".to_string(),
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timeout: Some(config::DEFAULT_EXTENSION_TIMEOUT),
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bundled: Some(true),
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available_tools: Vec::new(),
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}
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}
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}
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impl ExtensionConfig {
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pub fn sse<S: Into<String>, T: Into<u64>>(name: S, uri: S, description: S, timeout: T) -> Self {
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Self::Sse {
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name: name.into(),
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uri: uri.into(),
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envs: Envs::default(),
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env_keys: Vec::new(),
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description: description.into(),
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timeout: Some(timeout.into()),
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bundled: None,
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available_tools: Vec::new(),
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}
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}
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pub fn streamable_http<S: Into<String>, T: Into<u64>>(
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name: S,
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uri: S,
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description: S,
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timeout: T,
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) -> Self {
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Self::StreamableHttp {
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name: name.into(),
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uri: uri.into(),
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envs: Envs::default(),
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env_keys: Vec::new(),
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headers: HashMap::new(),
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description: description.into(),
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timeout: Some(timeout.into()),
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bundled: None,
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available_tools: Vec::new(),
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}
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}
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pub fn stdio<S: Into<String>, T: Into<u64>>(
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name: S,
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cmd: S,
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description: S,
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timeout: T,
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) -> Self {
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Self::Stdio {
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name: name.into(),
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cmd: cmd.into(),
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args: vec![],
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envs: Envs::default(),
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env_keys: Vec::new(),
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description: description.into(),
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timeout: Some(timeout.into()),
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bundled: None,
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available_tools: Vec::new(),
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}
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}
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pub fn inline_python<S: Into<String>, T: Into<u64>>(
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name: S,
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code: S,
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description: S,
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timeout: T,
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) -> Self {
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Self::InlinePython {
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name: name.into(),
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code: code.into(),
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description: description.into(),
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timeout: Some(timeout.into()),
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dependencies: None,
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available_tools: Vec::new(),
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}
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}
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pub fn with_args<I, S>(self, args: I) -> Self
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where
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I: IntoIterator<Item = S>,
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S: Into<String>,
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{
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match self {
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Self::Stdio {
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name,
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cmd,
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envs,
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env_keys,
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timeout,
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description,
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bundled,
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available_tools,
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..
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} => Self::Stdio {
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name,
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cmd,
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envs,
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env_keys,
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args: args.into_iter().map(Into::into).collect(),
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description,
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timeout,
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bundled,
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available_tools,
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},
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other => other,
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}
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}
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pub fn key(&self) -> String {
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let name = self.name();
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name_to_key(&name)
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}
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/// Get the extension name regardless of variant
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pub fn name(&self) -> String {
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match self {
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Self::Sse { name, .. } => name,
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Self::StreamableHttp { name, .. } => name,
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Self::Stdio { name, .. } => name,
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Self::Builtin { name, .. } => name,
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Self::Platform { name, .. } => name,
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Self::Frontend { name, .. } => name,
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Self::InlinePython { name, .. } => name,
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}
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.to_string()
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}
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/// Check if a tool should be available to the LLM
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pub fn is_tool_available(&self, tool_name: &str) -> bool {
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let available_tools = match self {
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Self::Sse {
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available_tools, ..
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}
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| Self::StreamableHttp {
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available_tools, ..
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}
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| Self::Stdio {
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available_tools, ..
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}
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| Self::Builtin {
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available_tools, ..
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}
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| Self::Platform {
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available_tools, ..
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}
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| Self::InlinePython {
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available_tools, ..
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}
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| Self::Frontend {
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available_tools, ..
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} => available_tools,
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};
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// If no tools are specified, all tools are available
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// If tools are specified, only those tools are available
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available_tools.is_empty() || available_tools.contains(&tool_name.to_string())
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}
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}
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impl std::fmt::Display for ExtensionConfig {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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ExtensionConfig::Sse { name, uri, .. } => write!(f, "SSE({}: {})", name, uri),
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ExtensionConfig::StreamableHttp { name, uri, .. } => {
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write!(f, "StreamableHttp({}: {})", name, uri)
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}
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ExtensionConfig::Stdio {
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|
name, cmd, args, ..
|
|
} => {
|
|
write!(f, "Stdio({}: {} {})", name, cmd, args.join(" "))
|
|
}
|
|
ExtensionConfig::Builtin { name, .. } => write!(f, "Builtin({})", name),
|
|
ExtensionConfig::Platform { name, .. } => write!(f, "Platform({})", name),
|
|
ExtensionConfig::Frontend { name, tools, .. } => {
|
|
write!(f, "Frontend({}: {} tools)", name, tools.len())
|
|
}
|
|
ExtensionConfig::InlinePython { name, code, .. } => {
|
|
write!(f, "InlinePython({}: {} chars)", name, code.len())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Information about the extension used for building prompts
|
|
#[derive(Clone, Debug, Serialize)]
|
|
pub struct ExtensionInfo {
|
|
pub name: String,
|
|
pub instructions: String,
|
|
pub has_resources: bool,
|
|
}
|
|
|
|
impl ExtensionInfo {
|
|
pub fn new(name: &str, instructions: &str, has_resources: bool) -> Self {
|
|
Self {
|
|
name: name.to_string(),
|
|
instructions: instructions.to_string(),
|
|
has_resources,
|
|
}
|
|
}
|
|
}
|
|
|
|
fn deserialize_null_with_default<'de, D, T>(deserializer: D) -> Result<T, D::Error>
|
|
where
|
|
T: Default + Deserialize<'de>,
|
|
D: Deserializer<'de>,
|
|
{
|
|
let opt = Option::deserialize(deserializer)?;
|
|
Ok(opt.unwrap_or_default())
|
|
}
|
|
|
|
/// Information about the tool used for building prompts
|
|
#[derive(Clone, Debug, Serialize, ToSchema)]
|
|
pub struct ToolInfo {
|
|
pub name: String,
|
|
pub description: String,
|
|
pub parameters: Vec<String>,
|
|
pub permission: Option<PermissionLevel>,
|
|
}
|
|
|
|
impl ToolInfo {
|
|
pub fn new(
|
|
name: &str,
|
|
description: &str,
|
|
parameters: Vec<String>,
|
|
permission: Option<PermissionLevel>,
|
|
) -> Self {
|
|
Self {
|
|
name: name.to_string(),
|
|
description: description.to_string(),
|
|
parameters,
|
|
permission,
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use crate::agents::*;
|
|
|
|
#[test]
|
|
fn test_deserialize_missing_description() {
|
|
let config: ExtensionConfig = serde_yaml::from_str(
|
|
"enabled: true
|
|
type: builtin
|
|
name: developer
|
|
display_name: Developer
|
|
timeout: 300
|
|
bundled: true
|
|
available_tools: []",
|
|
)
|
|
.unwrap();
|
|
if let ExtensionConfig::Builtin { description, .. } = config {
|
|
assert_eq!(description, "")
|
|
} else {
|
|
panic!("unexpected result of deserialization: {}", config)
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_deserialize_null_description() {
|
|
let config: ExtensionConfig = serde_yaml::from_str(
|
|
"enabled: true
|
|
type: builtin
|
|
name: developer
|
|
display_name: Developer
|
|
description: null
|
|
timeout: 300
|
|
bundled: true
|
|
available_tools: []
|
|
",
|
|
)
|
|
.unwrap();
|
|
if let ExtensionConfig::Builtin { description, .. } = config {
|
|
assert_eq!(description, "")
|
|
} else {
|
|
panic!("unexpected result of deserialization: {}", config)
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_deserialize_normal_description() {
|
|
let config: ExtensionConfig = serde_yaml::from_str(
|
|
"enabled: true
|
|
type: builtin
|
|
name: developer
|
|
display_name: Developer
|
|
description: description goes here
|
|
timeout: 300
|
|
bundled: true
|
|
available_tools: []
|
|
",
|
|
)
|
|
.unwrap();
|
|
if let ExtensionConfig::Builtin { description, .. } = config {
|
|
assert_eq!(description, "description goes here")
|
|
} else {
|
|
panic!("unexpected result of deserialization: {}", config)
|
|
}
|
|
}
|
|
}
|